CN116255840B

CN116255840B - Emission reduction heat exchanger for engine tail gas

Info

Publication number: CN116255840B
Application number: CN202310543161.4A
Authority: CN
Inventors: 周润斌; 周泽宏; 黄胤
Original assignee: Taizhou Yinfeng New Energy Technology Co ltd
Current assignee: Taizhou Yinfeng New Energy Technology Co ltd
Priority date: 2023-05-15
Filing date: 2023-05-15
Publication date: 2023-08-04
Anticipated expiration: 2043-05-15
Also published as: CN116255840A

Abstract

The invention relates to the technical field of emission reduction heat exchangers, in particular to an emission reduction heat exchanger for engine tail gas, which comprises a gas inlet flange, a gas flow equalizing plate, an inlet and outlet round part, an inlet and outlet connecting frame, a gas outlet flange, a cooling water inlet flange, a cooling water outlet flange, a heat exchanger shell, a waterway pipe box cover plate, a waterway pipe box partition plate, a waterway pipe connecting elbow, a waterway collecting pipe and waterway branch pipes, wherein the heat exchanger shell comprises a shell upper panel, a shell lower bottom plate and two groups of tube plates distributed on the front side and the rear side, a plurality of heat exchange tubes are uniformly distributed on the tube plates, and the heat exchange tubes are distributed in a regular triangle; the outside middle end of heat exchanger casing still rides and is equipped with supplementary promotion subassembly for promote the heat exchanger and control the removal. The invention can realize rapid cooling and condensing of the high-temperature tail gas generated by the engine to the required temperature, and simultaneously, the generated residual dust, impurities and wastewater are reasonably discharged.

Description

Emission reduction heat exchanger for engine tail gas

Technical Field

The invention relates to the technical field of engines, in particular to an emission reduction heat exchanger for engine tail gas.

Background

The smoke exhaust heat exchanger is a device for recovering energy by using waste heat in waste gas, and is generally applied to smoke exhaust systems of industrial and civil buildings. The smoke exhaust heat exchanger can transfer heat in high-temperature waste gas to water or air and other cooling media, so that the purposes of energy recovery and temperature reduction are achieved, and meanwhile, the pollution to the environment and the energy consumption can be reduced.

The traditional smoke exhaust heat exchanger mainly adopts a plane or spiral heat exchange tube, and has the following defects:

1. the pipeline system occupies large space and has low heat transfer efficiency;

2. under the condition of multiple circulation of multiple processes, the heat transfer efficiency is gradually decreased, and the energy cost is greatly increased;

3. in the design of the sewage discharge of the cleaning port, the cooling medium in the pipeline cannot be sufficiently cleaned and discharged.

Disclosure of Invention

The invention aims to provide an emission reduction heat exchanger for engine exhaust so as to solve the problems in the background art.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a reduce emission heat exchanger for engine exhaust, includes gas inlet flange, import and export round part, import and export connection frame, gas outlet flange, cooling water inlet flange, cooling water outlet flange and heat exchanger casing, still includes water route takeover elbow, water route assembly pipe, water route branch pipe, water route pipe case lid board and water route pipe case baffle, and the water route assembly pipe parallel arrangement has two sets of and distributes in the front side of heat exchanger casing, the heat exchanger casing includes casing top panel, casing lower plate and distributes in two sets of tube sheets of front and back both sides, still evenly distributed has many heat exchange tubes on the tube sheet, many heat exchange tubes are regular triangle-shaped and distribute;

the upper panel of the shell is also provided with a cleaning port, the horizontal two ends of the heat exchanger shell are fixedly connected with a group of inlet and outlet connecting frames, each group of inlet and outlet connecting frames is fixedly connected with a group of inlet and outlet round parts, the gas inlet flange is fixedly connected with the inlet and outlet round parts of the left end through a flue gas inlet, the gas outlet flange is fixedly connected with the inlet and outlet round parts of the right end through a flue gas outlet, and a gas flow equalizing plate is further arranged on the inner side of the inlet and outlet round parts close to the gas inlet flange;

the outside middle-end of heat exchanger casing is still ridden and is equipped with supplementary promotion subassembly, supplementary promotion subassembly includes door type benchmark frame, the equal symmetry in inner wall both sides of door type benchmark frame is provided with the short-circuit guide rail, the short-circuit guide rail spacing slip has cup jointed the dovetailed conducting bar, and the dovetailed conducting bar is fixed to be set up on the outer wall of tube sheet, and still is provided with actuating mechanism on the door type benchmark frame for promote the heat exchanger and control the removal.

Preferably, the lower bottom plate of the shell is provided with a convex water collecting tank in a downward protruding mode, and the central part of the convex water collecting tank is also provided with a sewage outlet.

Preferably, the upper end walls of the flue gas inlet and the flue gas outlet are respectively provided with a thermometer interface and a pressure measuring orifice for measuring the pressure and the temperature of the gas inlet and the gas outlet.

Preferably, the lower end face of the lower bottom plate of the shell is also fixedly provided with a support bottom plate, universal wheels are arranged on two sides of the lower end of the support bottom plate, and the number of the universal wheels is not less than four.

Preferably, the inlet and outlet antenna round part is also fixedly provided with a gas inlet and outlet frame reinforcing support plate, and the upper end of the upper panel of the shell is symmetrically provided with a shell top reinforcing support plate.

Preferably, the tube plate is further provided with a plurality of groups of waterway pipe box partition boards in parallel, a waterway branch pipe is distributed between two adjacent groups of waterway pipe box partition boards, five waterway branch pipes are arranged on each group of waterway collecting pipes, the cooling water inlet flange is fixed on the waterway collecting pipe at the lower end, and the cooling water outlet flange is fixed on the waterway collecting pipe at the upper end.

Preferably, the upper panel of the shell is provided with two cleaning openings in a penetrating way, and each cleaning opening is provided with a sealing cover with a handle.

Preferably, a group of supporting feet are connected to two ends of the bottom of the door-type reference frame through hinges, a containing opening is further formed in the door-type reference frame, the supporting feet are rotatably inserted in the containing opening, two groups of auxiliary supporting plates are symmetrically arranged on the inner side of the door-type reference frame, lower guide strips are arranged on the inner side of each auxiliary supporting plate in a penetrating way, and the lower guide strips are fixedly arranged on the tube plates.

Preferably, the door-shaped reference frame is internally provided with a placing groove for accommodating a driving mechanism, the driving mechanism comprises two driving shafts, two groups of belt pulleys and a driving belt, the two groups of belt pulleys are connected in series by the driving belt, the driving belt is transversely arranged in the placing groove, one end of the driving shaft is coaxially and fixedly connected with one belt pulley, and the other end of the driving shaft extends into the short-path guide rail and is fixedly connected with a driving gear.

Preferably, a group of driven gears are arranged in each group of short-path guide rails in a limiting rotation mode, driven racks in meshed connection with the driven gears are fixedly arranged on one side, close to the short-path guide rails, of each group of dovetail-shaped guide bars, one group of driving gears are directly meshed with the driven gears, and the other group of driving gears are connected with the driven gears through steering wheels.

Compared with the prior art, the invention has the beneficial effects that:

1. the high-temperature cooling smoke-discharging heat exchanger product provided by the invention adopts the finned tube as a heat exchanger, a multi-flow direction mode is designed to realize the effect of repeated circulating cooling, and the heat exchange efficiency and stability are improved by optimizing the shell structure, strengthening the support, pollution discharge design and other modes, so that the smoke-discharging heat exchanger product has certain innovation and practicability.

2. According to the invention, the auxiliary pushing assembly is arranged, so that the heat exchanger can be driven to move left and right integrally, the cleaning liquid in the heat exchanger is in a motion state, the cleaning effect is enhanced, and the performance and the service life of the heat exchanger are improved. Specifically, the driving mechanism can enable the cleaning liquid to flow more fully in the heat exchanger through the left-right swaying motion, so that a better flushing effect is achieved, and impurities such as dirt, dust and the like in the heat exchanger are cleaned. Meanwhile, the auxiliary pushing component can accelerate the flowing speed of the cleaning liquid in the flue gas pipeline, so that the flushing force is enhanced, and the damage of residual dirt to the heat exchanger is prevented.

3. The heat exchange tube adopts the seamless steel tube to match with the high-frequency welded all-stainless steel fin to enhance the heat radiation efficiency and reduce the leakage risk of the pipeline, and the product has small occupied space, compact structure, small resistance and high heat transfer efficiency, and the cleaning port pollution discharge design tube side cold medium multi-flow repeated circulation enhanced heat transfer efficiency achieves the effects of rapid cooling, cooling and emission reduction.

Drawings

Fig. 1 is a schematic perspective view of the structure of the present invention.

Fig. 2 is a schematic perspective view of another view of the structure of the present invention.

Fig. 3 is a schematic view of the temple of the present invention retracted into the receiving opening.

Fig. 4 is a schematic view of a cut-away of a housing according to the present invention.

FIG. 5 is a schematic view of the auxiliary pushing assembly of the present invention.

FIG. 6 is a schematic illustration of the connection of the drive mechanism to the dovetail bar of the present invention.

Fig. 7 is a schematic front view of the structure of the present invention.

Fig. 8 is a schematic top view of the structure of the present invention.

Fig. 9 is a schematic left-hand view of the structure of the present invention.

FIG. 10 is a schematic diagram of a gas flow equalization plate according to the present invention.

In the figure: 1. a gas inlet flange; 2. a thermometer interface; 3. an inlet and outlet dome part; 4. a gas flow equalizing plate; 5. the inlet and the outlet are connected with the frame; 6. a cleaning port; 7. a housing upper panel; 8. a gas outlet flange; 9. a cooling water inlet flange; 10. a housing lower plate; 11. a sewage outlet; 12. a heat exchange tube; 13. a universal wheel; 14. a cooling water outlet flange; 15. a gas inlet and outlet frame reinforcing support plate; 16. a support base plate; 17. a waterway connecting pipe elbow; 18. a waterway header pipe; 19. a waterway branch pipe; 20. a waterway pipe box partition board; 21. a tube sheet; 22. a housing top reinforcing support plate; 23. a gate-type reference frame; 24. a short track guide rail; 25. an auxiliary supporting plate; 26. supporting feet; 27. a receiving port; 28. dovetail-shaped guide bars; 29. a driven rack; 30. a lower guide bar; 31. a driven gear; 32. a drive gear; 33. a drive shaft; 34. a belt pulley; 35. a drive belt; 36. a waterway pipe box cover plate.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1 to 10, the present invention provides the following technical solutions: the utility model provides an emission reduction heat exchanger for engine exhaust, including gas inlet flange 1, import and export sky round portion 3, import and export connection frame 5, gas outlet flange 8, cooling water inlet flange 9, cooling water outlet flange 14 and heat exchanger casing, still include water route takeover elbow 17, water route header pipe 18, water route branch pipe 19, water route pipe case apron 36 and water route pipe case baffle 20, water route header pipe 18 parallel arrangement has two sets of and distributes in the front side of heat exchanger casing, the heat exchanger casing includes casing top panel 7, casing bottom plate 10 and distributes in two sets of tube sheets 21 of front and back both sides, still evenly distributed has many heat transfer tubes 12 on the tube sheet 21, many heat transfer tubes 12 are regular triangle-shaped and distribute;

further, the heat exchange tubes 12 are distributed in a regular triangle, and the design of the tube spacing and the fin spacing ensures small resistance when gas passes through;

the upper panel 7 of the shell is also provided with a cleaning port 6, the horizontal two ends of the heat exchanger shell are fixedly connected with a group of inlet and outlet connecting frames 5, each group of inlet and outlet connecting frames 5 is fixedly connected with a group of inlet and outlet round parts 3, the gas inlet flange 1 is fixedly connected with the inlet and outlet round parts 3 at the left end through a flue gas inlet, the gas outlet flange 8 is fixedly connected with the inlet and outlet round parts 3 at the right end through a flue gas outlet, and a gas flow equalizing plate 4 is further arranged on the inner side of the inlet and outlet round parts 3 close to the gas inlet flange 1;

further, by arranging the gas flow equalizing plate 4, the gas is uniformly dispersed and passes through the shell, so that the impact force of the gas on the fin tube is reduced.

The outside middle-end of heat exchanger casing is still ridden and is equipped with supplementary promotion subassembly, and supplementary promotion subassembly includes door type benchmark frame 23, and door type benchmark frame 23's inner wall both sides all symmetry are provided with short-channel guide rail 24, and short-channel guide rail 24 spacing sliding sleeve has dovetailed bar 28, and dovetailed bar 28 is fixed to be set up on the outer wall of tube sheet 21, and still is provided with actuating mechanism on the door type benchmark frame 23 for promote the heat exchanger and control the removal.

Further, through setting up dovetail guide bar 28 and short-circuit guide rail 24 cooperation and using, carry out the direction spacing to door-type benchmark frame 23, and through setting up supplementary promotion subassembly, can drive the heat exchanger and wholly move about for the washing liquid in the heat exchanger is in motion state, reinforcing cleaning performance improves the performance and the life-span of heat exchanger.

Specifically, the driving mechanism can enable the cleaning liquid to flow more fully in the heat exchanger through the left-right swaying motion, so that a better flushing effect is achieved, and impurities such as dirt, dust and the like in the heat exchanger are cleaned. Meanwhile, the auxiliary pushing component can accelerate the flowing speed of the cleaning liquid in the flue gas pipeline, so that the flushing force is enhanced, and the damage of residual dirt to the heat exchanger is prevented.

In a word, through the actuating mechanism that can drive whole rocking about for the heat exchanger that discharges fume, can reach better cleaning performance, reinforcing heat exchanger's performance and life-span, also can reduce environmental pollution simultaneously, have comparatively showing advantage.

The housing lower plate 10 is provided with a convex water collecting tank protruding downward, and the center of the convex water collecting tank is also provided with a drain 11.

Further, a flange and a ball valve are provided at the drain 11 for discharging the condensed water and dirt inside.

The upper end walls of the flue gas inlet and the flue gas outlet are respectively provided with a thermometer interface 2 and a pressure measuring orifice for measuring the pressure and the temperature of the gas inlet and the gas outlet.

The lower end face of the lower bottom plate 10 of the shell is also fixedly provided with a support bottom plate 16, universal wheels 13 are arranged on two sides of the lower end of the support bottom plate 16, and the number of the universal wheels 13 is not less than four.

Further, through setting up universal wheel 13, can make things convenient for the removal and the installation of heat exchanger, reduce resistance and the impact of removal, strengthen the stability of heat exchanger.

The inlet and outlet antenna part 3 is also fixedly provided with a gas inlet and outlet frame reinforcing support plate 15, and the upper end of the shell upper panel 7 is symmetrically provided with a shell top reinforcing support plate 22.

Further, by adopting the reinforcing support including the upper and lower plates of the housing for reinforcement in the dome of the gas inlet and outlet, the vibration caused by pressure fluctuation when the gas passes can be prevented.

The tube plate 21 is also provided with a plurality of groups of waterway pipe box partition plates 20 in parallel, a waterway branch pipe 19 is distributed between two adjacent groups of waterway pipe box partition plates 20, five waterway branch pipes 19 are arranged on each group of waterway branch pipes 18, the cooling water inlet flange 9 is fixed on the waterway branch pipe 18 at the lower end, and the cooling water outlet flange 14 is fixed on the waterway branch pipe 18 at the upper end.

Further, the water passes through the tube side, the size of the cooling water inlet flange is designed according to the water flow, cold water enters the water way collecting pipe 18 at the lower end through the water way connecting pipe elbow 17 at the lower end, and enters the 5-way flow pipeline for uniformly distributing and cooling by dividing the 5-way water way branch pipe 19, the effect of multiple circulating cooling is realized in a multi-flow direction mode, and the heat exchange efficiency is higher. The heat exchange tube 12 adopts a seamless steel tube and high-frequency welding all stainless steel fins to enhance the heat dissipation efficiency and reduce the risk of pipeline leakage.

Two cleaning openings 6 are formed in the upper panel 7 of the shell in a penetrating manner, and a sealing cover with a handle is arranged at each cleaning opening 6.

Further, through design washing mouth 6 on casing top panel 7, be convenient for with the leading-in casing of washing liquid to the residual dirt dust impurity when convenient washing tail gas passes through.

The two ends of the bottom of the door-shaped reference frame 23 are connected with a group of supporting feet 26 through hinges, the door-shaped reference frame 23 is also provided with a containing opening 27, the supporting feet 26 are rotatably inserted in the containing opening 27, two groups of auxiliary supporting plates 25 are symmetrically arranged on the inner side of the door-shaped reference frame 23, lower guide strips 30 penetrate through grooves on the inner side of the auxiliary supporting plates 25, and the lower guide strips 30 are fixedly arranged on the tube plate 21.

Specifically, when the heat exchanger is in normal operation, the supporting feet 26 are rotationally inserted into the accommodating port 27 for accommodating, so that the door-shaped reference frame 23 can be stably ridden on the heat exchanger; when the interior of the heat exchanger shell is required to be cleaned, the supporting feet 26 are turned downwards, and the door-shaped reference frame 23 is fixed on the ground by driving the ground piles, so that the heat exchanger can move left and right stably by taking the door-shaped reference frame 23 as a short-channel guide rail;

the door-shaped reference frame 23 is internally provided with a placing groove for accommodating a driving mechanism, the driving mechanism comprises two driving shafts 33, two groups of belt pulleys 34 and a transmission belt 35, the two groups of belt pulleys 34 are connected in series by the transmission belt 35, the transmission belt 35 is transversely arranged in the placing groove, one end of each driving shaft 33 is coaxially and fixedly connected with one belt pulley 34, and the other end of each driving shaft extends into the short-path guide rail 24 and is fixedly connected with a driving gear 32.

A group of driven gears 31 are arranged in each group of short-path guide rails 24 in a limiting rotation mode, driven racks 29 meshed with the driven gears 31 are fixedly arranged on one side, close to the short-path guide rails 24, of each group of dovetail-shaped guide bars 28, one group of driving gears 32 is directly meshed with the driven gears 31, and the other group of driving gears 32 are connected with the driven gears 31 through steering wheels.

Further, the end part of one group of driving shafts 33 is fixedly connected with a driving motor, and two groups of dovetail-shaped guide bars 28 can synchronously move linearly through the cooperation of the lower guide bars 30, the driven gear 31, the driving gear 32, the driving shafts 33, the belt pulley 34 and the transmission belt 35.

Specifically, under the cooperation of the driving belt 35 and the two groups of pulleys 34, one group of driving shafts 33 drives the other group of driving shafts 33 to synchronously rotate, so that the two groups of driving gears 32 synchronously rotate in the same direction, and as one group of driving gears 32 is directly meshed with the driven gears 31, the other group of driving gears 32 are connected with the driven gears 31 through steering wheels, the two groups of driven gears 31 synchronously rotate in opposite directions, and thus, the two groups of dovetail-shaped guide bars 28 synchronously move in a straight line.

The invention is used when in use: firstly, the flue gas passes through a shell pass, the high-temperature flue gas passes through an inlet gas flow equalizing plate 4 to uniformly disperse the gas through the shell pass, so that the impact force of the gas on the heat exchange tube 12 is reduced, and the heat exchange tube 12 is distributed in a regular triangle shape, wherein the design of the tube spacing and the fin spacing ensures that the resistance is small when the gas passes through; the dome part of the gas inlet and outlet adopts reinforced support, and comprises an upper plate and a lower plate of the shell to prevent the pressure fluctuation from generating vibration when the gas passes through. The cleaning opening 6 is designed on the upper panel 7 of the shell, so that residual dirt, dust and impurities are convenient to clean when tail gas passes through, and the lower bottom plate 10 of the shell is provided with a flange of a drain outlet of the convex water collecting tank and a ball valve for discharging internal condensate water and dirt. The flue gas inlet and outlet are provided with a thermometer interface 2 and a pressure measuring orifice, so that the pressure and the temperature of the gas inlet and outlet can be conveniently measured. The size of the flue gas inlet and outlet is designed according to the flow of the flue gas. The water passes through the tube side, the size of the cooling water inlet flange is designed according to the water flow, cold water enters 5 paths of flow pipelines through 5 paths of branch pipes of the inlet connecting pipe elbow collecting pipe, the cooling water is uniformly distributed and cooled, the effect of repeated circulating cooling is achieved through a flow direction mode of multiple flows, and the heat exchange efficiency is higher. The heat exchange tube adopts a seamless steel tube to match with a high-frequency welded all-stainless steel fin to enhance the heat dissipation efficiency and reduce the risk of pipeline leakage. The product of the invention has the advantages of small occupied space, compact structure, small resistance and high heat transfer efficiency, and the cleaning port pollution discharge design tube side cooling medium multi-flow repeated circulation enhanced heat transfer efficiency achieves the effect of rapid cooling and emission reduction.

When the heat exchanger normally operates, the supporting feet 26 are rotationally inserted into the accommodating opening 27 to be accommodated, so that the door-shaped reference frame 23 can be stably ridden on the heat exchanger; when the interior of the heat exchanger shell needs to be cleaned, the supporting feet 26 are turned downwards, and the door-shaped reference frame 23 is fixed on the ground by driving the ground piles;

then closing the flange interfaces, opening the cleaning port 6, filling cleaning liquid into the shell, and screwing the sealing cover to enable the shell to be in a relatively airtight state; then starting the driving motor to drive one group of driving shafts to rotate; under the cooperation of the transmission belt 35 and the two groups of belt pulleys 34, one group of driving shafts 33 drives the other group of driving shafts 33 to synchronously rotate, so that the two groups of driving gears 32 synchronously rotate in the same direction, and as one group of driving gears 32 are directly meshed with the driven gears 31, the other group of driving gears 32 are connected with the driven gears 31 through steering wheels, so that the two groups of driven gears 31 synchronously rotate in the opposite direction, and the two groups of dovetail guide bars 28 synchronously move in a straight line;

the universal wheels 13 are arranged at the bottom of the support base plate 16, so that the dovetail-shaped guide bars 28 can easily drive the whole heat exchanger to move left and right;

through the driving mechanism, the cleaning liquid can flow more fully in the heat exchanger through the left-right swaying movement, so that a better flushing effect is achieved, and impurities such as dirt, dust and the like in the heat exchanger are cleaned. Meanwhile, the auxiliary pushing component can accelerate the flowing speed of the cleaning liquid in the flue gas pipeline, so that the flushing force is enhanced, and the damage of residual dirt to the heat exchanger is prevented.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an emission reduction heat exchanger for engine exhaust, includes gas inlet flange (1), gas flow equalizing board (4), import and export sky round portion (3), import and export connection frame (5), gas outlet flange (8), cooling water inlet flange (9), cooling water outlet flange (14) and heat exchanger casing, its characterized in that: the heat exchanger comprises a heat exchanger shell, and is characterized by further comprising a waterway connecting pipe elbow (17), a waterway collecting pipe (18), waterway branch pipes (19), a waterway pipe box cover plate (36) and a waterway pipe box partition plate (20), wherein the waterway collecting pipe (18) is provided with two groups in parallel and is distributed on the front side of the heat exchanger shell, the heat exchanger shell comprises a shell upper panel (7), a shell lower bottom plate (10) and two groups of tube plates (21) distributed on the front side and the rear side, a plurality of heat exchange tubes (12) are uniformly distributed on the tube plates (21), and the heat exchange tubes (12) are distributed in a regular triangle;

the upper panel (7) of the shell is also provided with a cleaning port (6), the horizontal two ends of the heat exchanger shell are fixedly connected with a group of inlet and outlet connecting frames (5), each group of inlet and outlet connecting frames (5) is fixedly connected with a group of inlet and outlet round parts (3), the gas inlet flange (1) is fixedly connected with the inlet and outlet round parts (3) at the left end through a flue gas inlet, the gas outlet flange (8) is fixedly connected with the inlet and outlet round parts (3) at the right end through a flue gas outlet, and a gas flow equalizing plate (4) is further arranged on the inner side of the inlet and outlet round parts (3) close to the gas inlet flange (1);

the outside middle-end of heat exchanger casing is still ridden and is equipped with supplementary promotion subassembly, supplementary promotion subassembly includes door type benchmark frame (23), the equal symmetry in inner wall both sides of door type benchmark frame (23) is provided with short-channel guide rail (24), short-channel guide rail (24) spacing slip has cup jointed dovetail conducting bar (28), and dovetail conducting bar (28) are fixed to be set up on the outer wall of tube sheet (21), and still are provided with actuating mechanism on door type benchmark frame (23) for promote the heat exchanger and control the removal.

2. An emission reduction heat exchanger for engine exhaust as defined in claim 1, wherein: the shell lower bottom plate (10) is provided with a convex water collecting tank in a downward protruding mode, and the center of the convex water collecting tank is further provided with a sewage outlet (11).

3. An emission reduction heat exchanger for engine exhaust as defined in claim 1, wherein: the upper end walls of the flue gas inlet and the flue gas outlet are respectively provided with a thermometer interface (2) and a pressure measuring orifice for measuring the pressure and the temperature of the gas inlet and the gas outlet.

4. An emission reduction heat exchanger for engine exhaust as defined in claim 1, wherein: the lower end face of the shell lower bottom plate (10) is also fixedly provided with a support bottom plate (16), universal wheels (13) are arranged on two sides of the lower end of the support bottom plate (16), and the number of the universal wheels (13) is not less than four.

5. An emission reduction heat exchanger for engine exhaust as defined in claim 1, wherein: the inlet/outlet antenna round part (3) is also fixedly provided with a gas inlet/outlet frame reinforcing support plate (15), and the upper end of the shell upper panel (7) is symmetrically provided with a shell top reinforcing support plate (22).

6. An emission reduction heat exchanger for engine exhaust as defined in claim 1, wherein: the pipe plate (21) is further provided with a plurality of groups of waterway pipe box partition boards (20) in parallel, waterway branch pipes (19) are distributed between two adjacent groups of waterway pipe box partition boards (20), five waterway branch pipes (19) are arranged on each group of waterway collecting pipes (18), the cooling water inlet flange (9) is fixed on the waterway collecting pipe (18) at the lower end, and the cooling water outlet flange (14) is fixed on the waterway collecting pipe (18) at the upper end.

7. An emission reduction heat exchanger for engine exhaust as defined in claim 1, wherein: two cleaning openings (6) are formed in the upper panel (7) of the shell in a penetrating mode, and sealing covers with handles are arranged at the positions of the cleaning openings (6).

8. An emission reduction heat exchanger for engine exhaust as defined in claim 1, wherein: the utility model discloses a tube sheet (21), including door-type benchmark frame (23), hinge connection has a set of spike (26) at bottom both ends, still has seted up holding mouth (27) on door-type benchmark frame (23), spike (26) rotatable grafting is in holding mouth (27), still symmetry is provided with two sets of auxiliary support boards (25) on door-type benchmark frame (23) inboard, and auxiliary support board (25) inboard wears the groove and has down conducting bar (30), and lower conducting bar (30) are fixed to be set up on tube sheet (21).

9. An emission reduction heat exchanger for engine exhaust as defined in claim 1, wherein: the door-shaped standard frame (23) is internally provided with a placing groove for accommodating a driving mechanism, the driving mechanism comprises two driving shafts (33), two driven gears (31), two groups of belt pulleys (34) and a driving belt (35), the two groups of belt pulleys (34) are connected in series by the driving belt (35), the driving belt (35) is transversely arranged in the placing groove, one end of each driving shaft (33) is coaxially and fixedly connected with one belt pulley (34), and the other end of each driving shaft (33) extends into the short-channel guide rail (24) and is fixedly connected with a driving gear (32).

10. An emission reduction heat exchanger for engine exhaust as defined in claim 9, wherein: a group of driven gears (31) are arranged in each group of short-path guide rails (24) in a limiting rotation mode, driven racks (29) in meshed connection with the driven gears (31) are fixedly arranged on one side, close to the short-path guide rails (24), of each group of dovetail-shaped guide bars (28), one group of driving gears (32) are directly meshed and connected with the driven gears (31), and the other group of driving gears (32) are connected with the driven gears (31) through steering wheels.